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Schulz A, Moch K, Hinz Y, Lunkenheimer P, Böhmer R. Translational and reorientational dynamics in carboxylic acid-based deep eutectic solvents. J Chem Phys 2024; 160:074503. [PMID: 38380750 DOI: 10.1063/5.0189533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 01/18/2024] [Indexed: 02/22/2024] Open
Abstract
The glass formation and the dipolar reorientational motions in deep eutectic solvents (DESs) are frequently overlooked, despite their crucial role in defining the room-temperature physiochemical properties. To understand the effects of these dynamics on the ionic conductivity and their relation to the mechanical properties of the DES, we conducted broadband dielectric and rheological spectroscopy over a wide temperature range on three well-established carboxylic acid-based natural DESs. These are the eutectic mixtures of choline chloride with oxalic acid (oxaline), malonic acid (maline), and phenylacetic acid (phenylaceline). In all three DESs, we observe signs of a glass transition in the temperature dependence of their dipolar reorientational and structural dynamics, as well as varying degrees of motional decoupling between the different observed dynamics. Maline and oxaline display a breaking of the Walden rule near the glass-transition temperature, while the relation between the dc conductivity and dipolar relaxation time in both maline and phenylaceline is best described by a power law. The glass-forming properties of the investigated systems not only govern the orientational dipolar motions and rheological properties, which are of interest from a fundamental point of view, but they also affect the dc conductivity, even at room temperature, which is of high technical relevance.
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Affiliation(s)
- A Schulz
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - K Moch
- Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany
| | - Y Hinz
- Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany
| | - P Lunkenheimer
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany
| | - R Böhmer
- Fakultät Physik, Technische Universität Dortmund, 44221 Dortmund, Germany
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2
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Di Muzio S, Palumbo O, Trequattrini F, Paolone A. Binary Mixtures of Choline Acetate and Tetrabutylammonium Acetate with Natural Organic Acids by Vibrational Spectroscopy and Molecular Dynamics Simulations. J Phys Chem B 2024; 128:857-870. [PMID: 38224560 DOI: 10.1021/acs.jpcb.3c06407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2024]
Abstract
We present a study of several mixtures obtained by the mixing of two organic acetate-based salts (choline acetate, ChAc, or tetrabutylammonium acetate, TBAAc) with three different natural organic acids (ascorbic acid, AA, citric acid, CA, and maleic acid, MA). The structures of the starting materials and of the mixtures were characterized by infrared spectroscopy (FT-IR) and classic molecular dynamics simulations (MD). The thermal behavior was characterized by differential scanning calorimetry (DSC) and thermogravimetry analysis (TGA). The obtained mixtures, especially the ChAc-based ones, strongly tend to vitrify at low temperatures and are stable up to 100-150 °C. The FTIR measurements suggest the formation of a strong H-bond network: the coordination between acids and ChAc or TBAAc takes place by the donation of the H-bond by the acids to the oxygen of the acetate anion, which acts as an acceptor (HBA). The comparison with MD analysis indicates that acids predominantly exploit their more acidic hydrogens. In particular, we observe the progressive shift of νC═O and νOH when the ratios of acids increase. The structural differences between the two studied cations influence the spatial distribution of the components in the mixture bulk phases. In particular, the analysis of the theoretical structure function I(q) of the TBAAc-based systems shows the presence of important prepeaks at low q, a sign of the formation of apolar domain, due to the nanosegregation of the alkyl chains.
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Affiliation(s)
- Simone Di Muzio
- Department of Chemistry, Sapienza University of Rome, P. le Aldo Moro 5, 00185 Rome, Italy
- Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, P.le Aldo Moro 5, 00185 Rome, Italy
- Department of Physical and Chemical Science, University of L'Aquila, Via Vetoio 1, 67100 L'Aquila, Italy
| | - Oriele Palumbo
- Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, P.le Aldo Moro 5, 00185 Rome, Italy
| | - Francesco Trequattrini
- Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, P.le Aldo Moro 5, 00185 Rome, Italy
- Department of Physics, Sapienza University of Rome, P. le Aldo Moro 5, 00185 Rome, Italy
| | - Annalisa Paolone
- Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, P.le Aldo Moro 5, 00185 Rome, Italy
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3
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Malik A, Kashyap HK. Solvation Shell Anatomy of H 2S and CO Dissolved in Reline and Ethaline Deep Eutectic Solvents. J Phys Chem B 2023; 127:10392-10403. [PMID: 37983272 DOI: 10.1021/acs.jpcb.3c03411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Rising atmospheric concentrations of anthropogenic hydrogen sulfide (H2S) and carbon monoxide (CO) as a result of industrialization have encouraged researchers to explore innovative technologies for capturing these gases. Deep eutectic solvents (DESs) are an alternative media for mitigating H2S and CO emissions. Herein, we have employed ab initio molecular dynamics simulations to investigate the structures of the nearest-neighbor solvation shells surrounding H2S and CO when they are dissolved in reline and ethaline DESs. We aim to delineate the structural arrangement responsible for favorable H2S and CO capture by analyzing the key interactions between H2S and CO solutes with various components of the DESs. We observe that in the reline-H2S system, chloride and carbonyl oxygen of urea are found to have the closest distance interaction with hydrogen atoms of the H2S solute. The sulfur atom of H2S is found to be predominantly solvated by hydrogen and oxygen atoms of urea molecules and the hydroxyl hydrogen of choline cations. The chloride ions and ethylene glycol molecules predominantly govern the solvation of H2S in the ethaline-H2S system. In both the DESs, H2S is solvated by the hydroxyl group of the choline cations rather than by their ammonium group. In the reline-CO system, all the atoms of urea along with chloride dominate the immediate solvation shell around CO. In the ethaline-CO system, hydroxyl oxygen and hydrogen atoms of ethylene glycol are found in the nearest solvation structure around CO. Both the DESs exhibit a stronger solvent-solute charge-transfer tendency toward the H2S solute compared to CO.
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Affiliation(s)
- Akshay Malik
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Hemant K Kashyap
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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4
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Malik A, Kashyap HK. Solvation Shell Structures of Ammonia in Reline and Ethaline Deep Eutectic Solvents. J Phys Chem B 2023; 127:2499-2510. [PMID: 36912865 DOI: 10.1021/acs.jpcb.2c07929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
Abstract
Because of increasing atmospheric anthropogenic ammonia (NH3) emission, researchers are devising new techniques to capture NH3. Deep eutectic solvents (DESs) are found as potential media for NH3 mitigation. In the present study, we have carried out ab initio molecular dynamics (AIMD) simulations to decipher the solvation shell structures of an ammonia solute in reline (1:2 mixture of choline chloride and urea) and ethaline (1:2 mixture of choline chloride and ethylene glycol) DESs. We aim to resolve the fundamental interactions which help stabilize NH3 in these DESs, focusing on the structural arrangement of the DES species in the nearest solvation shell around NH3 solute. In reline, the hydrogen atoms of NH3 are preferentially solvated by chloride anions and the carbonyl oxygen atoms of urea. The nitrogen atom of NH3 renders hydrogen bonding with hydroxyl hydrogen of the choline cation. The positively charged head groups of the choline cations prefer to stay away from NH3 solute. In ethaline, strong hydrogen bonding interaction exists between the nitrogen atom of NH3 and hydroxyl hydrogen atoms of ethylene glycol. The hydrogen atoms of NH3 are found to be solvated by hydroxyl oxygen atoms of ethylene glycol and choline cation. While ethylene glycol molecules play a crucial role in solvating NH3, the chloride anions remain passive in deciding the first solvation shell. In both the DESs, choline cations approach NH3 from their hydroxyl group side. We observe slightly stronger solute-solvent charge transfer and hydrogen bonding interaction in ethaline than those in reline.
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Affiliation(s)
- Akshay Malik
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Hemant K Kashyap
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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5
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Novel Synthesis of Zinc Oxide Nanoparticles from Type IV Deep Eutectic Solvents. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2022.121268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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6
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Chai K, Lu X, Zhou Y, Liu H, Wang G, Jing Z, Zhu F, Han L. Hydrogen bonds in aqueous choline chloride solutions by DFT calculations and X-ray scattering. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Malik A, Kashyap HK. Solvent Organization around Methane Dissolved in Archetypal Reline and Ethaline Deep Eutectic Solvents as Revealed by AIMD Investigation. J Phys Chem B 2022; 126:6472-6482. [PMID: 35977089 DOI: 10.1021/acs.jpcb.2c02406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Because of the rising concentration of harmful greenhouse gases like methane in the atmosphere, researchers are striving for developing novel techniques for capturing these gases. Recently, neoteric liquids such as deep eutectic solvents (DESs) have emerged as an efficient means of sequestration of methane. Herein, we have performed ab initio molecular dynamics (AIMD) simulations to elucidate the solvation structure around a methane molecule dissolved in reline and ethaline DESs. We aim to elicit the structural organization of different constituents of the DESs in the vicinity of methane, particularly highlighting the key interactions that stabilize such gases in DESs. We observe quite different solvation structures of methane in the two DESs. In ethaline, chloride ions play an active role in solvating methane. Instead, in reline, chloride ions do not interact much with the methane molecule in the first solvation shell. In reline, choline cations approach the methane molecule from their hydroxyl group side, whereas urea molecules approach methane from their carbonyl oxygen as well as amide group sides. In ethaline, ethylene glycol and Cl- dominate the nearest neighbor solvation structure around the methane molecule. In both the DESs, we do not observe any significant methane-DES charge transfer interactions, apart from what is present between choline cation and Cl- anion.
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Affiliation(s)
- Akshay Malik
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
| | - Hemant K Kashyap
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi110016, India
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8
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Phenol-cyclohexanol eutectic mixtures: Phase diagram and microscopic structure by experimental and computational studies. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Malik A, Dhattarwal HS, Kashyap HK. An Overview of Structure and Dynamics Associated with Hydrophobic Deep Eutectic Solvents and Their Applications in Extraction Processes. Chemphyschem 2022; 23:e202200239. [PMID: 35702808 DOI: 10.1002/cphc.202200239] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 06/10/2022] [Indexed: 11/10/2022]
Abstract
Recent development of novel water-immiscible green solvents known as hydrophobic deep eutectic solvents (HDESs) has opened the gates for applications requiring media where presence of water is undesirable. Ever since they were prepared, researchers have used HDESs in diverse fields such as extraction processes, CO 2 sequestration, membrane formation, and catalysis. The microstructure and dynamics associated with the species comprising HDESs guide their suitability for specific applications. For example, varying the alkyl tail length of HDES components significantly affects the dynamics of the components and thus helps in tuning the efficiency of extraction processes. The development of HDESs is still in infancy and very few theoretical studies are available in the literature that help in understanding the structure and dynamics of HDESs. This review highlights the recent work focused on the microscopic structure and dynamics of HDESs and their potential applications, particularly in extraction processes. We have also provided a glimpse of how the integration of experiments and computational techniques can help understand the mechanism of extraction processes.
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Affiliation(s)
- Akshay Malik
- Indian Institute of Technology Delhi, Chemistry, Hauz Khas, 110016, New Delhi, INDIA
| | - Harender S Dhattarwal
- IIT Delhi: Indian Institute of Technology Delhi, Chemistry, Hauz Khas, 110016, New Delhi, INDIA
| | - Hemant Kumar Kashyap
- Indian Institute of Technology Delhi, Department of Chemistry, Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, 110016, New Delhi, INDIA
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10
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Muzio SD, Russina O, Mastrippolito D, Benassi P, Rossi L, Paolone A, Ramondo F. Mixtures of choline chloride and tetrabutylammonium bromide with imidazole as examples of deep eutectic solvents: their structure by theoretical and experimental investigation. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118427] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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11
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An efficient low melting mixture mediated green approach for the synthesis of 2-substituted benzothiazoles and benzimidazoles. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100338] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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12
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Kivelä H, Salomäki M, Vainikka P, Mäkilä E, Poletti F, Ruggeri S, Terzi F, Lukkari J. Effect of Water on a Hydrophobic Deep Eutectic Solvent. J Phys Chem B 2022; 126:513-527. [PMID: 35001628 PMCID: PMC8785191 DOI: 10.1021/acs.jpcb.1c08170] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 12/28/2021] [Indexed: 12/15/2022]
Abstract
Deep eutectic solvents (DESs) formed by hydrogen bond donors and acceptors are a promising new class of solvents. Both hydrophilic and hydrophobic binary DESs readily absorb water, making them ternary mixtures, and a small water content is always inevitable under ambient conditions. We present a thorough study of a typical hydrophobic DES formed by a 1:2 mole ratio of tetrabutyl ammonium chloride and decanoic acid, focusing on the effects of a low water content caused by absorbed water vapor, using multinuclear NMR techniques, molecular modeling, and several other physicochemical techniques. Already very low water contents cause dynamic nanoscale phase segregation, reduce solvent viscosity and fragility, increase self-diffusion coefficients and conductivity, and enhance local dynamics. Water interferes with the hydrogen-bonding network between the chloride ions and carboxylic acid groups by solvating them, which enhances carboxylic acid self-correlation and ion pair formation between tetrabutyl ammonium and chloride. Simulations show that the component molar ratio can be varied, with an effect on the internal structure. The water-induced changes in the physical properties are beneficial for most prospective applications but water creates an acidic aqueous nanophase with a high halide ion concentration, which may have chemically adverse effects.
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Affiliation(s)
- Henri Kivelä
- Department
of Chemistry, University of Turku, FI-20014 Turku, Finland
- Turku
University Centre for Surfaces and Materials (MatSurf), FI-20014 Turku, Finland
| | - Mikko Salomäki
- Department
of Chemistry, University of Turku, FI-20014 Turku, Finland
- Turku
University Centre for Surfaces and Materials (MatSurf), FI-20014 Turku, Finland
| | - Petteri Vainikka
- Department
of Chemistry, University of Turku, FI-20014 Turku, Finland
| | - Ermei Mäkilä
- Department
of Physics and Astronomy, University of
Turku, FI-20014 Turku, Finland
- Doctoral
School for Chemical and Physical Sciences, University of Turku, FI-20014 Turku, Finland
| | - Fabrizio Poletti
- Electrochemical
Sensors Group, Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Giuseppe Campi, 103, I-41125 Modena, Italy
| | - Stefano Ruggeri
- Electrochemical
Sensors Group, Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Giuseppe Campi, 103, I-41125 Modena, Italy
| | - Fabio Terzi
- Electrochemical
Sensors Group, Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Via Giuseppe Campi, 103, I-41125 Modena, Italy
| | - Jukka Lukkari
- Department
of Chemistry, University of Turku, FI-20014 Turku, Finland
- Turku
University Centre for Surfaces and Materials (MatSurf), FI-20014 Turku, Finland
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Smirnov MA, Fedotova VS, Sokolova MP, Nikolaeva AL, Elokhovsky VY, Karttunen M. Polymerizable Choline- and Imidazolium-Based Ionic Liquids Reinforced with Bacterial Cellulose for 3D-Printing. Polymers (Basel) 2021; 13:3044. [PMID: 34577946 PMCID: PMC8471885 DOI: 10.3390/polym13183044] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/04/2021] [Accepted: 09/06/2021] [Indexed: 11/23/2022] Open
Abstract
In this work, a novel approach is demonstrated for 3D-printing of bacterial cellulose (BC) reinforced UV-curable ion gels using two-component solvents based on 1-butyl-3-methylimidazolium chloride or choline chloride combined with acrylic acid. Preservation of cellulose's crystalline and nanofibrous structure is demonstrated using wide-angle X-ray diffraction (WAXD) and atomic force microscopy (AFM). Rheological measurements reveal that cholinium-based systems, in comparison with imidazolium-based ones, are characterised with lower viscosity at low shear rates and improved stability against phase separation at high shear rates. Grafting of poly(acrylic acid) onto the surfaces of cellulose nanofibers during UV-induced polymerization of acrylic acid results in higher elongation at break for choline chloride-based compositions: 175% in comparison with 94% for imidazolium-based systems as well as enhanced mechanical properties in compression mode. As a result, cholinium-based BC ion gels containing acrylic acid can be considered as more suitable for 3D-printing of objects with improved mechanical properties due to increased dispersion stability and filler/matrix interaction.
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Affiliation(s)
- Michael A. Smirnov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
- Institute of Chemistry, Saint Petersburg State University, Universitetsky pr. 26, Peterhof, 198504 St. Petersburg, Russia
| | - Veronika S. Fedotova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
- Institute of Chemistry, Saint Petersburg State University, Universitetsky pr. 26, Peterhof, 198504 St. Petersburg, Russia
| | - Maria P. Sokolova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
| | - Alexandra L. Nikolaeva
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
| | - Vladimir Yu. Elokhovsky
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
| | - Mikko Karttunen
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi pr. 31, 199004 St. Petersburg, Russia; (V.S.F.); (M.P.S.); (A.L.N.); (V.Y.E.)
- Department of Chemistry, The University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada
- Department of Physics and Astronomy, The University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada
- The Centre of Advanced Materials and Biomaterials Research, The University of Western Ontario, 1151 Richmond Street, London, ON N6A 5B7, Canada
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14
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Malik A, Kashyap HK. Multiple evidences of dynamic heterogeneity in hydrophobic deep eutectic solvents. J Chem Phys 2021; 155:044502. [PMID: 34340384 DOI: 10.1063/5.0054699] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Hydrophobic deep eutectic solvents (HDESs) have gained immense popularity because of their promising applications in extraction processes. Herein, we employ atomistic molecular dynamics simulations to unveil the dynamics of DL-menthol (DLM) based HDESs with hexanoic (C6), octanoic (C8), and decanoic (C10) acids as hydrogen bond donors. The particular focus is on understanding the nature of dynamics with changing acid tail length. For all three HDESs, two modes of hydrogen bond relaxations are observed. We observe longer hydrogen bond lifetimes of the inter-molecular hydrogen bonding interactions between the carbonyl oxygen of the acid and hydroxyl oxygen of menthol with hydroxyl hydrogen of both acids and menthol. We infer strong hydrogen bonding between them compared to that between hydroxyl oxygen of acids and hydroxyl hydrogens of menthol and acids, marked by a faster decay rate and shorter hydrogen bond lifetime. The translational dynamics of the species in the HDES becomes slower with increasing tail length of the organic acid. Slightly enhanced caging is also observed for the HDES with a longer tail length of the acids. The evidence of dynamic heterogeneity in the displacements of the component molecules is observed in all the HDESs. From the values of the α-relaxation time scale, we observe that the molecular displacements become random in a shorter time scale for DLM-C6. The analysis of the self-van Hove function reveals that the overall distance covered by DLM and acid molecules in the respective HDES is more than what is expected from ideal diffusion. As marked by the shorter time scale associated with hole filling, the diffusion of the oxygen atom of menthol and the carbonyl oxygen of acid from one site to the other is fastest for hexanoic acid containing HDES.
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Affiliation(s)
- Akshay Malik
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Hemant K Kashyap
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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15
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Amphlett J, Choi S. The effect of increasing water content on transition metal speciation in deep eutectic solvents. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115845] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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16
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Jani A, Malfait B, Morineau D. On the coupling between ionic conduction and dipolar relaxation in deep eutectic solvents: Influence of hydration and glassy dynamics. J Chem Phys 2021; 154:164508. [PMID: 33940805 DOI: 10.1063/5.0050766] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have studied the ionic conductivity and the dipolar reorientational dynamics of aqueous solutions of a prototypical deep eutectic solvent (DES), ethaline, by dielectric spectroscopy in a broad range of frequencies (MHz-Hz) and for temperatures ranging from 128 to 283 K. The fraction of water in the DES was varied systematically to cover different regimes, starting from the pure DES and its water-in-DES mixtures to the diluted electrolyte solutions. Depending on these parameters, different physical states were examined, including low viscosity liquid, supercooled viscous liquid, amorphous solid, and freeze-concentrated solution. Both the ionic conductivity and the reorientational relaxation exhibited characteristic features of glassy dynamics that could be quantified from the deviation from the Arrhenius temperature dependence and non-exponential decay of the relaxation function. A transition occurred between the water-in-DES regime (<40 wt. %), where the dipolar relaxation and ionic conductivity remained inversely proportional to each other, and the DES-in-water regime (>40 wt. %), where a clear rotation-translation decoupling was observed. This suggests that for a low water content, on the timescale covered by this study (∼10-6 to 1 s), the rotational and transport properties of ethaline aqueous solutions obey classical hydrodynamic scaling despite these systems being presumably spatially microheterogeneous. A fractional scaling is observed in the DES-in-water regime due to the formation of a maximally freeze-concentrated DES aqueous solution coexisting with frozen water domains at sub-ambient temperature.
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Affiliation(s)
- Aicha Jani
- Institute of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, F-35042 Rennes, France
| | - Benjamin Malfait
- Institute of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, F-35042 Rennes, France
| | - Denis Morineau
- Institute of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, F-35042 Rennes, France
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17
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Naseem Z, Shehzad RA, Ihsan A, Iqbal J, Zahid M, Pervaiz A, Sarwari G. Theoretical investigation of supramolecular hydrogen-bonded choline chloride-based deep eutectic solvents using density functional theory. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138427] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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18
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Malik A, Kashyap HK. Heterogeneity in hydrophobic deep eutectic solvents: SAXS prepeak and local environments. Phys Chem Chem Phys 2021; 23:3915-3924. [DOI: 10.1039/d0cp05407k] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The observation of the prepeak in the simulated total X-ray scattering structure function (S(q)) reveals the presence of intermediate-range structural heterogeneity in hydrophobic deep eutectic solvents.
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Affiliation(s)
- Akshay Malik
- Department of Chemistry
- Indian Institute of Technology Delhi
- Hauz Khas
- India
| | - Hemant K. Kashyap
- Department of Chemistry
- Indian Institute of Technology Delhi
- Hauz Khas
- India
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Hansen BB, Spittle S, Chen B, Poe D, Zhang Y, Klein JM, Horton A, Adhikari L, Zelovich T, Doherty BW, Gurkan B, Maginn EJ, Ragauskas A, Dadmun M, Zawodzinski TA, Baker GA, Tuckerman ME, Savinell RF, Sangoro JR. Deep Eutectic Solvents: A Review of Fundamentals and Applications. Chem Rev 2020; 121:1232-1285. [PMID: 33315380 DOI: 10.1021/acs.chemrev.0c00385] [Citation(s) in RCA: 763] [Impact Index Per Article: 190.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Deep eutectic solvents (DESs) are an emerging class of mixtures characterized by significant depressions in melting points compared to those of the neat constituent components. These materials are promising for applications as inexpensive "designer" solvents exhibiting a host of tunable physicochemical properties. A detailed review of the current literature reveals the lack of predictive understanding of the microscopic mechanisms that govern the structure-property relationships in this class of solvents. Complex hydrogen bonding is postulated as the root cause of their melting point depressions and physicochemical properties; to understand these hydrogen bonded networks, it is imperative to study these systems as dynamic entities using both simulations and experiments. This review emphasizes recent research efforts in order to elucidate the next steps needed to develop a fundamental framework needed for a deeper understanding of DESs. It covers recent developments in DES research, frames outstanding scientific questions, and identifies promising research thrusts aligned with the advancement of the field toward predictive models and fundamental understanding of these solvents.
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Affiliation(s)
- Benworth B Hansen
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee37996-2200, United States
| | - Stephanie Spittle
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee37996-2200, United States
| | - Brian Chen
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Derrick Poe
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Yong Zhang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jeffrey M Klein
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Alexandre Horton
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee37996-2200, United States
| | - Laxmi Adhikari
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, United States
| | - Tamar Zelovich
- Department of Chemistry, New York University, New York, New York 10003, United States
| | - Brian W Doherty
- Department of Chemistry, New York University, New York, New York 10003, United States
| | - Burcu Gurkan
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Edward J Maginn
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Arthur Ragauskas
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee37996-2200, United States
| | - Mark Dadmun
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37916, United States
| | - Thomas A Zawodzinski
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee37996-2200, United States
| | - Gary A Baker
- Department of Chemistry, University of Missouri-Columbia, Columbia, Missouri 65211, United States
| | - Mark E Tuckerman
- Department of Chemistry, New York University, New York, New York 10003, United States
| | - Robert F Savinell
- Department of Chemical and Biomolecular Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Joshua R Sangoro
- Department of Chemical and Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee37996-2200, United States
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A combined electrochemical, infrared and EDXD tool to disclose Deep Eutectic Solvents formation when one precursor is liquid: Glyceline as case study. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.114292] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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21
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Kaur S, Kumari M, Kashyap HK. Microstructure of Deep Eutectic Solvents: Current Understanding and Challenges. J Phys Chem B 2020; 124:10601-10616. [DOI: 10.1021/acs.jpcb.0c07934] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Supreet Kaur
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Monika Kumari
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Hemant K. Kashyap
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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22
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Percevault L, Jani A, Sohier T, Noirez L, Paquin L, Gauffre F, Morineau D. Do Deep Eutectic Solvents Form Uniform Mixtures Beyond Molecular Microheterogeneities? J Phys Chem B 2020; 124:9126-9135. [DOI: 10.1021/acs.jpcb.0c06317] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Lucie Percevault
- Institute of Chemical Sciences of Rennes, CNRS-University of Rennes 1, UMR 6226, Rennes F-35042, France
| | - Aicha Jani
- Institute of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, Rennes F-35042, France
| | - Thibaut Sohier
- Institute of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, Rennes F-35042, France
| | - Laurence Noirez
- Laboratoire Léon Brillouin (CEA-CNRS), CEA-Saclay, Université Paris-Saclay, Gif-sur-Yvette F-91191, France
| | - Ludovic Paquin
- Institute of Chemical Sciences of Rennes, CNRS-University of Rennes 1, UMR 6226, Rennes F-35042, France
| | - Fabienne Gauffre
- Institute of Chemical Sciences of Rennes, CNRS-University of Rennes 1, UMR 6226, Rennes F-35042, France
| | - Denis Morineau
- Institute of Physics of Rennes, CNRS-University of Rennes 1, UMR 6251, Rennes F-35042, France
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Karimi MB, Mohammadi F, Hooshyari K. Non-humidified fuel cells using a deep eutectic solvent (DES) as the electrolyte within a polymer electrolyte membrane (PEM): the effect of water and counterions. Phys Chem Chem Phys 2020; 22:2917-2929. [PMID: 31951238 DOI: 10.1039/c9cp06207f] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this research, deep eutectic solvents (DESs) were prepared and employed as the electrolyte in Nafion membranes. Different factors, such as the water content and Nafion counterions (H+, Li+, Na+ and K+), which could influence the PEM performance, were evaluated. The obtained results showed that the presence of water may have a constructive or destructive effect on the DES and Nafion/DES properties, which should be considered for their final applications. Also, the electronegativity of the counterion can significantly influence the Nafion/DES proton conductivity. The prepared Nafion/DES composite membranes showed superconducting properties as a result of a Grotthuss-like mechanism for proton conduction. The conductivities of the prepared membranes were compared to those of other membranes based on an upper bound concept, which showed the potential use of DESs as a promising alternative to conventional ionic liquids. Finally, the fuel cell performances of the prepared membranes at different temperatures were evaluated.
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Affiliation(s)
- Mohammad Bagher Karimi
- Faculty of Petrochemicals, Iran Polymer and Petrochemical Institute, 14965-115 Tehran, Iran.
| | - Fereidoon Mohammadi
- Faculty of Petrochemicals, Iran Polymer and Petrochemical Institute, 14965-115 Tehran, Iran.
| | - Khadijeh Hooshyari
- Department of Applied Chemistry, Faculty of Chemistry, Urmia University, Urmia, Iran
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Wang Y, Chen W, Zhao Q, Jin G, Xue Z, Wang Y, Mu T. Ionicity of deep eutectic solvents by Walden plot and pulsed field gradient nuclear magnetic resonance (PFG-NMR). Phys Chem Chem Phys 2020; 22:25760-25768. [DOI: 10.1039/d0cp01431a] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The transport properties and ionicity of DESs were investigated by using Walden plot and the pulsed field gradient NMR method.
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Affiliation(s)
- Yaqing Wang
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Wenjun Chen
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Qi Zhao
- Institute of Coal Chemistry
- Chinese Academy of Science
- Taiyuan 030001
- China
| | - Guizhen Jin
- Beijing Key Laboratory of Ionic Liquids Clean Process
- CAS Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex Systems
- Institute of Process Engineering
- Chinese Academy of Sciences
- Beijing 100190
| | - Zhimin Xue
- Beijing Key Laboratory of Lignocellulosic Chemistry
- College of Materials Science and Technology
- Beijing Forestry University
- Beijing 100083
- China
| | - Yingxiong Wang
- Institute of Coal Chemistry
- Chinese Academy of Science
- Taiyuan 030001
- China
| | - Tiancheng Mu
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
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25
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Colmenero F. Mechanical properties of anhydrous oxalic acid and oxalic acid dihydrate. Phys Chem Chem Phys 2019; 21:2673-2690. [DOI: 10.1039/c8cp07188h] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The mechanical properties of oxalic acid dihydrate and anhydrous oxalic acid (α and β polymorphic forms) were obtained by using rigorous theoretical solid-state methods based on density functional theory using plane waves and pseudopotentials.
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Affiliation(s)
- Francisco Colmenero
- Instituto de Estructura de la Materia – Consejo Superior de Investigaciones Científicas (IEM-CSIC)
- 123 – 28006 Madrid
- Spain
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